What is Hubble’s Law? Explain Red Shift of Galaxies.
admin To study the Hubble’s law we have to study the Red Shift first. Red Shift: From the studies it was found that the spectrum automatically bends towards the red end…
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Explain the various theories of the origin of Universe?
There are three main theories :- 1. The Steady State Theory 2. The Big Bang Theory 3. The Pulsating Theory The Steady Sate theory: It states that the counting of…
Important Facts About Universe
• The stars having zero magnitude will be less bright than the stars having negative magnitudes. • Those stars which are red in color will have less temperature than the…
What is Communication?
Communicate means to exchange information between each other. There are lots of ways available through which we can communicate with each other. These are speech, gestures etc. Basically long distance…
What is Modulation?
Modulation is a process in which the audio signal having very low frequency is put on a sine wave having frequency higher than that of the audio signal. The equation…
What is Amplitude modulation?
Amplitude modulation is the process in which instantaneous amplitude of audio frequency is directly proportional to the amplitude of the high frequency carrier wave. Formula used to calculate the depth…
What is Frequency Modulation?
In frequency modulation the variation in frequency of the carrier wave happens due to the instantaneous value of the modulating voltage. In this case the amplitude is made constant. The…
What is the difference between Amplitude modulation and frequency modulation?
1. In case of frequency modulation the change in amplitude may be due to noise. If we make use of amplitude limiters in FM receivers then we can completely vanish…
What is pulse modulation?
The transmission of analog data or speech which is in continuous form is known as pulse modulation. At some certain levels or points, the wave formation can be seen in…
What is Pulse Amplitude Modulation and Pulse time modulation?
In Pam each sample is directly proportional to signal amplitude. Generally it is used for the modulation of the carrier wave The part (a) of figure represents the modulating signal.…